77907613218 has 32 divisors (see below), whose sum is σ = 156787384320. Its totient is φ = 25807256400.

The previous prime is 77907613211. The next prime is 77907613261. The reversal of 77907613218 is 81231670977.

It is not an unprimeable number, because it can be changed into a prime (77907613211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5655423 + ... + 5669181.

It is an arithmetic number, because the mean of its divisors is an integer number (4899605760).

Almost surely, 2^77907613218 is an apocalyptic number.

77907613218 is an abundant number, since it is smaller than the sum of its proper divisors (78879771102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77907613218 is a wasteful number, since it uses less digits than its factorization.

77907613218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19582.

The product of its (nonzero) digits is 889056, while the sum is 51.

The spelling of 77907613218 in words is "seventy-seven billion, nine hundred seven million, six hundred thirteen thousand, two hundred eighteen".